XQ1 underwater housng and focus speed.

My gf is looking for a new camera. I suggested I would give her my X100 when I upgrade but she has no interest in learning photography other than how to turn the camera on and how to push the shutter. I am also looking to upgrade my f31 with its underwater housing before we go to Argentina next year.

Three questions please:

Would the XQ1 be good camera for someone who just wants to push a shutter?

Does it have face detect and how good is it?

How fast is the focus as we will be photographing sealions? My G7 was quick enough the last time I was there.